Today’s Lesson: Don’t order IC’s from China

After some very helpful assistance from some of the folks on the Muffwiggler forum (and Pharmasonic), I’ve determined that all the LM301 opamps I purchased off eBay are bad. I found 3 opamps that I had ordered for the S&H and Mixer units in my 1st round of work on this project that LM301 compatible, …

The First Troubleshooting Success

After a few days of nagging Pharmasonic and many users of the Muffwiggler forums, I have managed to troubleshoot the 1st of my problematic modules, the 707 Amp/EF/Integrator, and this process has uncovered problems in several of the other modules as well. It turns out the LM301 opamp IC’s that I bought are bad. These …

Still Waiting on the Boards

I have sorted all my bits. I have separated 1% tolerance resistors from the 5% resistors, then sorted each group into order of resistance. I have separated the electrolytic, tantalum, and ceramic caps. I filled a 40-drawer storage box with IC’s, transistors, trims, switches, sockets, and other parts, each meticulously labelled. I have filled 4 …